It's the size of a football field, and can float at 20,000 feet for three weeks at a time. It's the latest surveillance mega-vehicle from Northrop Grumman.

According to Danger Room:

The military already employs a fleet of blimps to look for enemies and relay communications. But none of them are as big, as high-flying, or as far-seeing as this Long Endurance Multi-Intelligence Vehicle, or LEMV. It's supposed to float at 20,000 feet for up to three weeks at a time, snooping on absolutely everything below with a variety of sensors.

"Basically what we see it as is an unblinking eye," LEMV project manager Marty Sargent tells Inside Defense.

Sargent figures it would take as many as 12 of the military's advanced Reaper surveillance drones "to do the same mission that the LEMV would do."

The first airship is supposed to be inflated around 10 months from now.